% Match-points used for synchronization of NGRIP, GRIP, and GISP2
%
% File NGRIP_GRIP_GISP2_match_points_27nov2006
% The file contains the match points used for the transfer of the GICC05 time scale from NGRIP to GRIP and GISP2.
% The three cores have been matched using mainly volcanic markers.
% The uncertainty of the match point depths is discussed in the Quat. Sci. Res. paper referenced below.
%
% Synchronized data from the three cores can be obtained from www.icecores.dk
% (file name GICC05_NGRIP_GRIP_GISP2_data_20y_27nov2006).
%
% The NGRIP1 core reaches down to a depth of 1372 m. The NGRIP2 core (drilled 20 meters away from the 
% NGRIP1 core) reaches from surface to bedrock, but high-resolution measurements have only been carried
% out downwards from 1346 m. In the 26 m overlap zone, the cores are offset by 0.43 m on average, 
% probably due to uncertainties in the logging procedure (see Schøtt Hvidberg et al., Ann. Glac. 35, 2002).
% Thus, the same features appear at larger depths in the NGRIP1 than in the NGRIP2 core. 
% The first 5 match-points have been defined using NGRIP1 data, and 0.43 m has been subtracted from the
% NGRIP1 depth to obtain the NGRIP2 depth quoted.
%
% REFERENCES:
%
% The match points down to 1609.45 m NGRIP depth have been published in 
% S.O. Rasmussen, K.K. Andersen, A.M. Svensson, J.P. Steffensen, B.M. Vinther, H.B. Clausen, 
% M.-L. Siggaard-Andersen, S.J. Johnsen, L.B. Larsen, D. Dahl-Jensen, M. Bigler, R. Röthlisberger, 
% H. Fischer, K. Goto-Azuma, M.E. Hansson, and U. Ruth
% A new Greenland ice core chronology for the last glacial termination
% Journ. Geophys. Res., vol. 111, D06102, 2006, doi:10.1029/2005JD006079
%
% The remaining part of the match points are related to work described in the paper
% S.O. Rasmussen, I.K. Seierstad, K.K. Andersen, M. Bigler, and S.J. Johnsen
% Synchronization of the NGRIP, GRIP, and GISP2 ice cores across MIS 2 and palaeoclimatic implications
% Accepted, Quat. Sci. Rev., INTIMATE special issue, 2007
%
% For more data downloads, go to www.icecores.dk		
%		
%NGRIP2	GRIP	GISP2    
%depth	depth	depth
%(m)	(m)	(m)
1228.64	1334.01	1392.61
1273.30	1380.35	1439.75
1296.12	1404.30	1463.71
1309.99	1418.70	1477.87
1341.28	1452.85	1511.41
1380.18	1496.02	1554.34
1409.84	1528.59	1586.99
1426.17	1547.10	1605.06
1457.67	1583.90	1639.79
1470.60	1598.90	1653.90
1473.84	1602.60	1657.40
1476.52	1605.75	1660.33
1479.68	1609.40	1663.80
1485.10	1615.65	1669.75
1487.44	1618.35	1672.48
1488.57	1619.74	1673.75
1491.36	1623.05	1676.85
1492.61	1624.50	1678.24
1495.68	1627.70	1681.28
1496.37	1628.44	1681.96
1501.83	1634.60	1687.75
1504.02	1637.10	1690.06
1506.10	1639.55	1692.32
1508.05	1641.70	1694.24
1517.98	1652.89	1704.44
1522.15	1657.50	1708.64
1524.80	1660.45	1711.24
1527.35	1663.35	1713.90
1529.02	1665.26	1715.71
1530.50	1667.00	1717.27
1531.75	1668.51	1718.68
1538.39	1676.25	1725.78
1545.65	1684.66	1733.62
1556.83	1697.69	1745.64
1563.08	1705.06	1752.47
1564.50	1706.65	1753.94
1567.56	1710.20	1757.26
1570.50	1713.74	1760.39
1577.60	1721.72	1767.97
1580.71	1725.40	1771.50
1587.62	1733.75	1779.16
1590.45	1736.75	1782.22
1595.10	1742.31	1787.43
1601.59	1749.88	1794.47
1604.93	1753.72	1798.16
1606.57	1755.50	1799.80
1607.45	1756.55	1800.73
1609.45	1758.71	1802.88
1610.80	1760.19	1804.23
1612.00	1761.46	1805.41
1614.72	1764.35	NaN
1619.57	1769.52	1812.91
1621.54	1771.62	NaN
1625.58	1775.82	1818.89
1627.96	1778.34	1821.27
1642.66	1793.37	1835.43
1645.83	1796.72	1838.60
1687.77	1840.78	1883.03
1688.68	NaN	1883.92
1692.63	1845.56	NaN
1693.68	1846.60	NaN
NaN	1847.87	1890.11
1699.82	1852.61	1894.73
1705.79	NaN	1900.61
NaN	1863.67	1905.31
1714.18	1867.33	1908.76
1716.15	1869.39	1910.69
1719.13	1872.49	NaN
1721.32	1874.76	1915.73
1728.59	1882.23	1922.77
NaN	1892.18	1932.03
1770.81	1926.34	1963.66
1782.66	1939.26	NaN
1783.70	1940.37	NaN
1798.35	1955.95	1990.98
1802.27	1960.03	NaN
1814.92	NaN	2006.77
1820.39	1978.58	2012.06
1831.58	NaN	2022.79
1840.22	1997.83	2030.74
1843.68	2001.13	2033.89
NaN	2018.28	2049.96
1862.58	2018.92	2050.57
1864.02	2020.43	2051.97
1866.21	2022.53	2054.07
1866.87	2023.14	2054.62
1868.55	2024.82	NaN
NaN	2025.98	2057.25
1870.39	2026.64	2057.85
1871.39	2027.53	NaN
1872.25	2028.27	2059.49
1880.01	2035.25	2066.16
1888.70	2043.41	2074.09
1889.86	2044.51	2075.17
1892.66	NaN	2077.40
1894.01	2048.24	NaN
1902.84	2055.99	2086.38
NaN	2057.36	2087.71
1916.80	2068.05	NaN
1918.95	2069.76	2099.52
1929.87	2079.37	2108.90
1931.05	2080.41	2109.92
1939.51	2087.83	2117.07
1939.94	2088.21	2117.40
1944.45	2092.24	2121.23
1946.54	2094.09	2123.05
1947.34	2094.83	2123.75
1947.94	2095.39	2124.27
1948.72	2096.11	2124.95
1949.23	2096.59	2125.40
1949.57	2096.92	2125.72
1950.07	NaN	2126.15
1950.45	2097.75	2126.51
1951.09	2098.33	2127.05